Lock



D. P. SLIND.

LOCK.

APPLlcATloN FILED SEPT. a. |920.

' Patented June 7, 1921.

DONALD P. SLIND, OF RYLEY, ALBERTA, GANADA.

Loon.

Specication of Letters Patent.

Patented June 19121.

Application filed September 8, 1920. Serial No. 408,861.

T 0 all whom t may concern Be it known that I, DONALD, P. SLIND, acitizen of Canada, residing at Ryley, Province of Alberta, and Dominionof Canada, have invented certain new and useful improvements in Locks,of which the following is a specification.

IThis invention relates to improvements in locks, particularly so-calledcylinder locks, and it is the object of the vinvention to provide a lockof this type of an extremely simple and therefore inexpensive construetion.

A further object of the invention is to provide a lock of this typehaving a bolt moving on the arc of a circle into and out of its lockingposition.

Other objects and advantages of the invention will become apparent asthe description proceeds and will be more clearly set forth in theappended claims.

1n the accompanying drawing, forming a material part of this invention,a preferred form of my invention is illustrated and in this drawing-Figure 1 is a sectional front elevation of a lock constructed accordingto the present invention.

Fig. 2 is a side view thereof partly in section on line 2-2 of Fig. 1with the locking bolt in open position as seen in dotted lines in Fig.1, and

Fig. 3 is a section taken on line 3 3 Fig. 1.

Fig. 4 is a detail view of the spring arrangement of the lock.

The casing 10 adapted to be secured to a door 11 by means of screws 12or the like has an opening 13 in one of its side walls through which thelocking bolt 14 swings outwardly which is pivotally secured on a pin 15in a bracket 16 secured to the inner wall of the casing. The bolt 14 isprovided at its lower end with a shoulder 17 having a recess or cam facein its front end for engagement by the rear, or bolt operating end of akey 18. In the jamb 19 of a door, a casing 20 is provided as shown inFig. 1 having end flanges 21 and 22 adapted to be secured to the edge ofthe jamb by screws 23 or the like, and provided with an opening 24 insaid edge for the passage of the locking bou, il. i c Y Within thecasing 10 a block 25 is secured by screws 26 and a chamber 27 in thisblock contains a predetermined number of strong, Vshort springs 28, forinstance as shown by way oi' example three of such springs, the upperends o1 which are secured to bolts29 passed through the upper wall ofthe chamber. When the lock is closed, the lower ends of these strongsprings 28 which as shown in Fig. 4 are provided with pins 28 and whichare o1 unequal lengths, enter a recess 30 in a rotatable barrel 31 of aform ilustrated in Fig. 1, to a depth which is governed by the length ofthe springs 28 and hold this barrel 31 immobile in the outer stationaryylinder 32. wW hen the key 18 is inserted into the recess 80 or keyhole,it lii'ts the springs one after another, and when itis all the way in,the projections or protuberances 33 of the key will hold all the springsin the chamber 27, and barrel and bolt can be turned bythe key to openor close the lock.

lt will be clear that the number of springs may be changed as well astheir length, and that the system is thus capable of an infinite numberof combinations, for the proj ections may be provided on the key in anydesired way and the springs regulated to lit them or vice versa. rEhekeys can be made absolutely individual and their cross-sed tion may bemade to lit the recess 30 or they may be made with straightcross-section. r1`hey may also be provided at their sides with guidegrooves corresponding to similar guide ribs or ridges in the barrel.

Having thus described my invention what l claim as new and desire tosecure by Letters Patent of the United States ism 1, In a lock orn thecharacter described, the combination of a casing, a locking boltpivotally arranged within said casing, a block provided with a chamber,a plurality of springs in said chamber, a recessed barrel into therecess oit which the lower ends of said springs project, and a keyprovided with projections of a number and size adapted to gradually,push said springs into their chamber for allowing a rotation of saidbarrel and bolt by said key.

2. ln a lock of the character described, the combination of a casingadapted to be secured to a door, and having an opening in its side, alocking bolt pivotally secured within said casing and adapted to beswung through the opening in said side into a keeper in the amb of thedoor, a stationary cylinder, a rotatable, recessed barrel within saidcylinderprovided with a keyhole, a

block secured between the side walls of said casing and having an innerchamber, a predetermined number of springs secured with their upper endsto the roei' of said chamber and projecting with their lower ends todiiierent depths into the recess ot said barrel, a key provided withprojections 01"' a number and size corresponding to the number and sizeof the springs, said springs adapted to be engaged by correspondinghigher or lower projections ot said key when introduced through thekey-hole.

3. ln a locl ci the character described, the coi'ebination of a door andits jamb with 'a casing secured in said door, and a casing secured inthe j amb, both casings provided with lateral openings in alinenientwith each other, and a locking bolt pivoted within the door casing andadapted to be swung through the side opening of the door casing and theside opening of the jamb casing into and out ot the latter, a shoulderon said bolt, and a cam tace on said shoulder adapted to be engaged bythe end ot a key, and means for allowing the introduction of the key forthe operation of said bolt ii the number and shape ot its projectionscorresponds to the predetermined number and length of a means fornormally holding the lock closed. el.. ln a lock of' the characterdescribed, the combination of a casing and a pivotally arranged boltwithin said casing of a cam face on said bolt adapted to be engaged bythe end of a key, a stationary cylinder, a recessed and rotatable barrelin said cylinder, a block in said casing provided with a chamber, apredetermined number' oi strong springs in said casing having ,varyinglength and extending with their lower ends correspondingly deeper orless deep into the recess of said barrel, said lower ends adapted to beengaged by the projections of a key corresponding in height and in theirspaced relation to the arrangement of said springs for pushing saidsprings into their chamber and allowing a passage of the key and arotation of the barrel for the operation of said belt to lock and unlockthe lock. ln testimony whereof l have affixed my signature.

DONALD rf. snmp.4

